I've repaired about 20 different Gameboys. The community for Gameboy repair and mods is huge. I suggest watching a few of macho nacho videos on YouTube to work up the nerves to open it. They are so easy to fix, and there is a modern replacement for almost anything you can break. Also take a look at the ifixit guides. https://www.ifixit.com/Device/Game_Boy
https://www.retromodding.com/products/game-boy-battery-housing-contacts
fix if yourself, itll be a good experience.
I totally agree. I repaired and upgraded my GBA SP and it was such an incredible learning experience. Also confidence boosting.
It would help if you tell us where you are located geographically and what specifically is wrong with it that needs repairing.
This guide might be helpful: ifixit game boy battery corrosion
1up restorations modded my NES for RGB - highly recommend them. https://1uprestorations.com/
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